EP3990961A1 - Module optique comprenant une matrice de micro-miroirs - Google Patents
Module optique comprenant une matrice de micro-miroirsInfo
- Publication number
- EP3990961A1 EP3990961A1 EP20733377.4A EP20733377A EP3990961A1 EP 3990961 A1 EP3990961 A1 EP 3990961A1 EP 20733377 A EP20733377 A EP 20733377A EP 3990961 A1 EP3990961 A1 EP 3990961A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support
- wedge
- electronic card
- chip
- optical module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 claims description 23
- 230000000284 resting effect Effects 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims 2
- 238000000034 method Methods 0.000 description 7
- 230000035882 stress Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 206010063493 Premature ageing Diseases 0.000 description 1
- 208000032038 Premature aging Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0019—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having reflective surfaces only (e.g. louvre systems, systems with multiple planar reflectors)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/39—Attachment thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
- F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
- G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
- G02B26/0833—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
- G02B26/0841—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD the reflecting element being moved or deformed by electrostatic means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/181—Printed circuits structurally associated with non-printed electric components associated with surface mounted components
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/003—Alignment of optical elements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10121—Optical component, e.g. opto-electronic component
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10227—Other objects, e.g. metallic pieces
- H05K2201/10409—Screws
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10431—Details of mounted components
- H05K2201/10598—Means for fastening a component, a casing or a heat sink whereby a pressure is exerted on the component towards the PCB
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- Optical module comprising a matrix of micro-mirrors
- the invention relates to an optical module, in particular an optical module equipped with an array of micro-mirrors.
- the invention also relates to a method of manufacturing such an optical module.
- the invention also relates to a headlight for a motor vehicle comprising such an optical module.
- a micro-mirror array is a micro-electromechanical system comprising a multitude of micro-mirrors which are all movable around an axis and which can take at least two distinct orientations. According to a first orientation, a micro-mirror transmits a light ray out of the optical module, in a field of illumination. In a second orientation, the light ray is deflected out of the field of illumination.
- the orientation of each micro-mirror can be individually controlled by the effect of an electrostatic force.
- the optical module comprises an electronic control unit.
- the chip comprising the matrix of micro-mirrors is fixed on an electronic card connected to the electronic control unit.
- the electronic control unit transmits a control current via the electronic card to each of the micro-mirrors to define their orientation.
- optical modules make it possible to compose and project complex images in front of the vehicle. They are therefore used to perform various functions such as, for example, the projection of information useful for the safety of pedestrians located in the immediate vicinity of the vehicle, or for example a road lighting function preventing the dazzling of other motorists.
- the images produced by the optical module must therefore be sharp and correctly
- the electronic card on which the chip is attached must also be maintained.
- the electronic card is generally fixed to a housing or to a support of the optical module.
- the position and orientation of the array of micro-mirrors are therefore affected by the manufacturing tolerances of the electronic card, by the assembly tolerances of the chip on the electronic card and finally by the assembly tolerances of the card.
- the array of micro mirrors is therefore not always positioned with precision relative to the light source. It follows that the images produced by the optical module do not always have the required sharpness and / or precision.
- the object of the invention is to provide an optical module and a method of manufacturing such an optical module overcoming the above drawbacks and improving the optical modules and the manufacturing methods known from the prior art.
- a first object of the invention is an optical module allowing precise positioning and orientation of an array of micro-mirrors.
- a second object of the invention is an optical module in which the card
- a third object of the invention is an optical module that is simple to manufacture.
- the subject of the invention is thus an optical module which is remarkable in that it comprises a support, an electronic card, an electronic chip provided with a matrix of micro-mirrors, and at least one wedge, the chip being fixed to the electronic card, the support comprising a first surface resting against the chip and a second surface resting against the at least one wedge, the second surface of the support being inclined relative to the first surface of the support, the at least one wedge resting against the electronic card.
- the module comprises at least a second wedge
- the support comprises a third surface bearing against the at least second wedge, the third surface of the support being inclined with respect to the first surface of the support, the minus the second wedge resting against the electronic card.
- the first surface of the support is substantially positioned between the second surface of the support and the third surface of the support.
- the module comprises at least one fixing screw passing through the electronic card, the at least one wedge and the support, so as to lock the wedge in position relative to the support.
- the support comprises means for indexing the position of the chip relative to the support, and / or in that the support comprises a stopper arranged at one end of the second surface of the support, the stopper being able to prevent a sliding the at least one wedge off the second surface of the support.
- the electronic card extends along a plane
- the subject of the invention is also a headlight for a motor vehicle, comprising at least one light source and an optical module as defined above.
- a subject of the invention is a method of manufacturing an optical module as defined above, remarkable in that it comprises: • a step of positioning the at least one wedge resting against the second surface of the support,
- the method may further comprise an additional step of screwing a fixing screw through the electronic card, the at least one wedge and the support, so as to lock the at least one wedge in position with respect to the support.
- the method comprises a step of compressing the chip against the support during the step of moving the at least one wedge along the second surface of the support, and possibly during the screwing step of the screw. of fixation.
- the method comprises a step of positioning a piece of tooling against the electronic card, so as to prevent deformation of the electronic card under the effect of pressing the at least one wedge against the electronic card, during the step of moving the at least one wedge along the second surface of the support, and possibly during the step of screwing in the fixing screw.
- Figure 1 is a schematic view of a vehicle headlight
- FIG. 2 is a partial schematic view of a support and a wedge of the optical module.
- FIG. 3A is a schematic view of a first step of a method of manufacturing an optical module according to an embodiment of the invention.
- FIG. 3B is a schematic view of a second step of the manufacturing process.
- Figure 3C is a schematic view of a third step of the manufacturing process.
- Figure 3D is a schematic view of a fourth step of the manufacturing process.
- Figure 3E is a schematic view of a fifth step of the manufacturing process.
- FIG. 1 schematically illustrates a projector 1 according to one embodiment of the invention.
- the projector 1 is a lighting device for a motor vehicle. It is suitable for projecting a luminous image onto a scene surrounding the vehicle. In particular, it makes it possible to illuminate the environment of the vehicle and to make the vehicle visible to other road users.
- the projector 1 can be a front projector or a rear projector of the vehicle.
- the projector 1 comprises a light source 2 and an optical module 3 according to one embodiment of the invention.
- the light source 2 and the optical module 3 are fixed in a housing 4 of the headlight intended to be fixed to the vehicle.
- the projector further comprises an optical projection system 5 capable of shaping a light beam.
- the light source 2 can be of any kind, in particular, it can comprise one or more light-emitting diodes and / or an incandescent bulb and / or any other equivalent light source.
- the housing 4 is a structure supporting the various elements of the projector 1.
- the housing can in particular support the light source 2, the optical module 3, and the projection optical system 5.
- the housing can also include one or more means of attachment for its attachment to a vehicle.
- the projection optical system 5 can comprise a set of one or more transparent, translucent or reflective optical lenses.
- the projection optical system is capable of being crossed by light rays R coming from the light source.
- the relative position of the light source 2, the optical module 3 and the projection system 5 must be very precise in order to obtain sharp images.
- the optical module 3 comprises a chip 10, an electronic card 20, a support 30, a first wedge 40 and a second wedge 50.
- Chip 10 is an electronic component, fixed and electrically connected to electronic card 20.
- Chip 10 may have a generally square or rectangular shape.
- the chip comprises a first face or surface 11 by which it rests against the electronic card 20, and a second face or surface 12 by which it rests against the support 30.
- the first surface 11 is opposite the second surface 32.
- the second surface 12 of the chip 10 protrudes from the electronic card in the direction of the support.
- the chip 10 comprises a matrix of micro-mirrors 13.
- the matrix of micro-mirrors 13 is a micro-electromechanical system comprising a multitude of flat micro-mirrors which are all independently movable around an axis. Each micro mirror can take two distinct orientations: a so-called “active” orientation and a so-called “inactive” orientation. The orientation of each micro-mirror can be individually controlled by the effect of an electrostatic force.
- the array of micro-mirrors can include several hundred micro-mirrors across the width and several hundred micro-mirrors along the length.
- the array of micro-mirrors 13 is integrated into the chip 10 of larger dimension.
- the array of micro-mirrors is arranged on the second surface 12 of the chip 10.
- the light source 2 is arranged so as to be able to project light rays R onto the array of micro-mirrors.
- the light rays reflected by micro-mirrors in active orientation can pass through the projection optical system 5 to usefully contribute to a lighting function.
- the light rays reflected by micro-mirrors in inactive orientation are reflected towards an area not
- the optical module can comprise a heat sink (not shown) capable of removing the heat stored by the array of micro mirrors due to the light radiation to which it is subjected.
- the heat sink can be in direct contact with the chip.
- the heat sink can be mounted to rest on a part of the first surface 11 of the chip 10.
- the electronic card 20 can precisely include an opening 23 positioned vis-à-vis the first surface 11 of the chip. .
- the heat sink then extends through this opening. It can also extend from the side of the card
- Electronic board 20 is a printed circuit board (also referred to as a PCB) extending in a plane. It can have any shape, for example a generally rectangular shape. It can comprise electronic components other than the chip 10, and electrical tracks making it possible to connect the electronic components together. It can also include a connector allowing the electronic card to be connected to a control unit.
- PCB printed circuit board
- the electronic card comprises a first surface 21 bearing against the chip, against the first wedge and against the second wedge.
- the electronic card also includes a second surface 22 opposite to the first surface 21.
- the support 30 is a structure supporting the electronic card 20.
- the position of the support 30 is well defined within the projector 1, and in particular with respect to the position of the light source 2.
- the support 30 can be rigidly fixed to the housing 4 of the projector.
- the support 30 may comprise fixing means able to cooperate with the housing.
- the support could even form one and the same part with the housing 4 of the projector.
- the support 30 can be a one-piece element, for example made of injected plastic.
- the holder can be made in
- PES GF20 polyethersulphone with 20% glass fibers
- the support 30 comprises a first surface 31 bearing against the second surface 12 of the chip, a second surface 32 bearing against the first wedge 40, and a third surface 33 bearing against the second wedge 50.
- the first surface 31 of the support is substantially positioned between the second surface 32 of the support and the third surface 33 of the support. In other words, the second surface 32 and the third surface 33 are positioned on either side of the first surface 31.
- the first surface 31 can be divided into two zones 31 A, 31 B which are distinct from one another and extend along two opposite edges of the second surface 12 of the chip.
- the first surface may include a single continuous area extending around the periphery of the first surface.
- the first surface 31 could comprise any shape capable of providing support to the chip 10.
- the first surface 31 bears against a reference surface of the chip. During the construction of the chip 10, the position of this reference surface is positioned with adequate precision relative to the array of micro-mirrors 13.
- the first surface 31 of the support, the first surface 11 of the chip 10, the second surface 12 of the chip 10, the first surface 21 of the electronic card 20, the second surface 12 of the electronic card 20 are substantially parallel to each other.
- the support further comprises means 34 for indexing the position of the chip relative to the support.
- These indexing means may be in the form of one or more studs projecting in the direction of the chip and cooperating with a mating opening made on the second surface of the chip.
- the support comprises a central opening 35 positioned vis-à-vis the die. of micro-mirrors 13.
- a transparent lens or a protective glass can be mounted in this central opening 35 to protect the array of micro-mirrors.
- the second surface 32 of the support is inclined relative to the first surface 31 of the support. More precisely, the second surface 32 extends along an inclined plane extending towards the interior of the optical module and towards the electronic card 20.
- the first surface 31 of the support can form with the second surface 32 of the support an angle A1 which is defined inside the friction cone defined by the coefficient of friction between the support and the shim.
- the third surface 33 of the support is inclined relative to the first surface of the support.
- the third surface 33 of the support can be symmetrical with respect to the second surface along a plane perpendicular to the first surface 31.
- the first surface 31 of the support can also form with the third surface 33 of the support an angle between A ° and B ° inclusive, in particular between C ° and D ° inclusive, possibly equal to the angle A1.
- the second surface 32 and the third surface may be tilted in different directions, as shown in Figure 1, or alternatively, in identical directions.
- the first wedge 40 and the second wedge 50 may be identical or symmetrical with respect to one another. We therefore endeavor to describe the first wedge 40 as well as its interface with the electronic card and the support.
- the first wedge 40 which could also be called a "wedge" is an element of the optical module interposed between the support 30 and the electronic card 20.
- the wedge 40 is a separate part from the support 30. It comprises a first surface 41 resting against the first surface 21 the electronic card 20 and a second surface 42 resting against the second surface 32 of the support 30.
- the first surface 41 forms with the second surface 42 an angle equal to the angle A1 formed between the first surface 31 of the support and the second surface 32 of the support. Consequently, the first surface 41 extends in a plane substantially parallel to the plane in which the electronic card 20 extends.
- the support 30 is not in contact with the electronic card but it is linked to the electronic card on the one hand, via the chip 10 and on the other hand, via the two wedges 40 and 50
- the optical module could comprise a single wedge or else three or even more wedges.
- the wedge 40 further comprises a through opening 43 oriented substantially perpendicular to the first surface 41.
- the optical module also comprises a first fixing screw 60 passing through a hole 24 in the electronic card 20, through the opening. through 43 of the first wedge 40, and finally through a threaded opening 36 of the support 10.
- a screw head 61 rests against the second surface 22 of the electronic card 20
- threads of the fixing screw 60 cooperate with the threaded opening 36 mating and made in the support 30.
- the first fixing screw 60 makes it possible to tighten the electronic board 20. on the wedge, and the wedge on the support.
- the first fixing screw therefore makes it possible to block the first wedge in position relative to the support by tightening its surfaces 41, 42.
- a second fixing screw 70 cooperates identically with the second wedge 50.
- the first screw 60 and the second screws 70 therefore constitute two points of attachment of the electronic card to the support.
- FIGS. 3A to 3E illustrating five successive assembly steps.
- FIGS. 3A to 3E illustrating five successive assembly steps.
- only part of the optical module 3 appears in these figures, thus revealing only the use of a single wedge, which is considered to be the wedge 40.
- the mounting of an optical module comprising two or more wedges shims can of course be obtained by performing the same operations, at the same times, with the other shims.
- the support 30 can be oriented such that the first surface 31 of the support is horizontal and facing upwards.
- the elements are rigidly fixed to each other. others and the optical module could be integrated in any orientation in the projector 1.
- a support 30 is provided.
- the latter is positioned horizontally, that is to say so that its first surface 31 extends horizontally.
- the wedge 40 is also brought and it is positioned on the support so that its second surface 42 bears against the second surface 32 of the support.
- the support 30 advantageously comprises a stop 37 arranged at one end of the second surface 32, in particular below the second surface.
- This stop 37 is a means for retaining the wedge 40, prior to its final fixing with the fixing screw 60.
- the stop 37 is able to prevent sliding, under the effect of gravity, of the first wedge 40 out of the second surface of the support.
- the support may include a second stop (not shown) arranged at one end of the third surface of the support. The second stop is adapted to prevent the second wedge from sliding out of the third surface of the support.
- a second step E2 illustrated in FIG. 3B, an assembly formed by the electronic card 20 and the chip 10 resting on the first surface 31 of the support 30 is positioned.
- the chip 10 is assembled (for example welded or plugged in) to the electronic card 20 during a preliminary assembly step.
- the chip is fixed to the electronic card according to given positioning tolerances.
- the assembly is positioned so that the indexing means 34 of the support cooperate with the chip 10.
- the chip finds a unique position defined with reference to the support 30.
- pressure can be applied to the first surface 11 of the chip, for example via the opening 23 in the electronic card.
- a tool 80 is positioned above the electronic card, against the second surface 22 of the electronic card.
- the tool piece 80 is not an element of the optical module 3 but an element useful only for the method of manufacturing the optical module. In particular, it makes it possible to prevent any upward deformation of the electronic card during the subsequent steps of the method. In other words, it allows the electronic card to be clamped.
- the tool piece 80 can have a through opening 81 and it can be positioned so that the through opening 81 is centered around the hole 24 made in the electronic card.
- a vertical force F1 can be applied from top to bottom on the chip 10 (or on its heat sink) so as to ensure that it maintains contact against the chip. the first surface 31 of the support.
- a fourth step E4 illustrated in FIG. 3D, the wedge 40 is moved along the second surface 32 of the support.
- the wedge is pushed in a direction which causes the wedge to move in translation upward.
- a thrust F2 oriented from the outside to the inside of the module is suitable.
- a jack or an operator can achieve this thrust.
- Note the slope according to which the second surface is inclined could be oriented in any direction.
- the direction which is illustrated in the described embodiment allows easy handling of the wedge since it can be manipulated from a lateral side of the module.
- the wedge 40 is therefore pushed along the second surface until it comes to bear against the first surface 21 of the electronic card 20. As the tool piece 80 bears on the second surface 22 of the electronic card 20, effort applied by the wedge 40 on the electronic card does not cause deformation of the electronic card.
- the angle A1 is large enough to provide sufficient positioning amplitude of the wedge 40 relative to the support 30.
- the angle A1 is also small enough to prevent any subsequent sliding of the wedge 40, which would then lose contact either with the electronic card 20 or with the support 30.
- the angle A1 can be defined to be less than the angle of a friction cone between the wedge 40 and the support 30.
- the angle of the friction cone depends on the coefficient of adhesion between the second surface 42 of the wedge 40 and the second surface 32 of the support 30.
- a fifth step E5, illustrated in FIG. 3E the fixing screw 60 is screwed through the hole 24, through the through opening 43 and through the threaded opening 36.
- the through opening 43 is wide enough for the fixing screw to pass through this opening, without contact with the wedge 40, regardless of the position of the wedge 40.
- the through opening 43 may for example be in the form of a slot or an oblong opening oriented in the direction in which the wedge is likely to be moved.
- the fixing screw 60 can also pass through the through opening 81 of the tool piece 80.
- the tension applied by the fixing screw 60 makes it possible to keep the support 30, the wedge 40 and the electronic card 20 well resting against each other.
- a washer 62 may be provided at the interface between the screw head 61 and the second surface 22 of the electronic card 20.
- As the angle A1 is defined inside the friction cone defined by the coefficient of friction between the support and the wedge, there is no risk of the wedge moving once the fixing screw 60 is tightened. Therefore it is it is possible to release the forces F1 and F2 applied respectively to the chip 10 and to the wedge 40.
- the tool piece 80 can also be removed.
- the manufacturing process which has just been described it is possible to simply assemble an optical module so that the chip takes a single position defined with reference to the support.
- the method does not require the use of glue, which is advantageous because the use of glue in an assembly method is difficult.
- the electronic card integral with the chip is also fixed to the support without additional stress or deformation.
- the attachment of the assembly formed by the electronic card and the chip to the support is an isostatic attachment.
- the position of the chip does not run the risk of being disturbed by constraints which could have been transmitted by the electronic card.
- the absence of stress in the electronic card prevents premature aging of the electronic card.
- the reliability of the optical module is thus improved.
- the invention can be implemented for the manufacture of any optical module comprising a chip fixed to an electronic card and the positioning of which within the optical module must be very precise.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optical Couplings Of Light Guides (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1907195A FR3097978B1 (fr) | 2019-06-28 | 2019-06-28 | Module optique comprenant une matrice de micro-miroirs |
PCT/EP2020/065882 WO2020260001A1 (fr) | 2019-06-28 | 2020-06-08 | Module optique comprenant une matrice de micro-miroirs |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3990961A1 true EP3990961A1 (fr) | 2022-05-04 |
EP3990961B1 EP3990961B1 (fr) | 2024-07-31 |
Family
ID=67957133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20733377.4A Active EP3990961B1 (fr) | 2019-06-28 | 2020-06-08 | Module optique comprenant une matrice de micro-miroirs |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3990961B1 (fr) |
FR (1) | FR3097978B1 (fr) |
WO (1) | WO2020260001A1 (fr) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100332967B1 (ko) * | 2000-05-10 | 2002-04-19 | 윤종용 | 디지털 마이크로-미러 디바이스 패키지의 제조 방법 |
US8270172B2 (en) * | 2010-04-23 | 2012-09-18 | GE Intelligent Platforms Embedded Systems, Inc. | Wedge lock for use with a single board computer, a single board computer, and method of assembling a computer system |
US9577361B2 (en) * | 2014-10-22 | 2017-02-21 | International Business Machines Corporation | Pluggable LGA socket for high density interconnects |
JP6011667B2 (ja) * | 2015-03-20 | 2016-10-19 | 日本電気株式会社 | 冷却装置 |
US20180320718A1 (en) * | 2017-05-02 | 2018-11-08 | Arconic Inc. | Torque limiter wedges |
-
2019
- 2019-06-28 FR FR1907195A patent/FR3097978B1/fr active Active
-
2020
- 2020-06-08 EP EP20733377.4A patent/EP3990961B1/fr active Active
- 2020-06-08 WO PCT/EP2020/065882 patent/WO2020260001A1/fr active Application Filing
Also Published As
Publication number | Publication date |
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FR3097978A1 (fr) | 2021-01-01 |
EP3990961B1 (fr) | 2024-07-31 |
FR3097978B1 (fr) | 2021-06-25 |
WO2020260001A1 (fr) | 2020-12-30 |
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